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5a178186 VO |
1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2 | /* | |
3 | * include/net/dsa_stubs.h - Stubs for the Distributed Switch Architecture framework | |
4 | */ | |
5 | ||
6 | #include <linux/mutex.h> | |
7 | #include <linux/netdevice.h> | |
8 | #include <linux/net_tstamp.h> | |
9 | #include <net/dsa.h> | |
10 | ||
11 | #if IS_ENABLED(CONFIG_NET_DSA) | |
12 | ||
13 | extern const struct dsa_stubs *dsa_stubs; | |
14 | ||
15 | struct dsa_stubs { | |
6ca80638 FF |
16 | int (*conduit_hwtstamp_validate)(struct net_device *dev, |
17 | const struct kernel_hwtstamp_config *config, | |
18 | struct netlink_ext_ack *extack); | |
5a178186 VO |
19 | }; |
20 | ||
6ca80638 FF |
21 | static inline int dsa_conduit_hwtstamp_validate(struct net_device *dev, |
22 | const struct kernel_hwtstamp_config *config, | |
23 | struct netlink_ext_ack *extack) | |
5a178186 VO |
24 | { |
25 | if (!netdev_uses_dsa(dev)) | |
26 | return 0; | |
27 | ||
28 | /* rtnl_lock() is a sufficient guarantee, because as long as | |
29 | * netdev_uses_dsa() returns true, the dsa_core module is still | |
30 | * registered, and so, dsa_unregister_stubs() couldn't have run. | |
31 | * For netdev_uses_dsa() to start returning false, it would imply that | |
6ca80638 | 32 | * dsa_conduit_teardown() has executed, which requires rtnl_lock(). |
5a178186 VO |
33 | */ |
34 | ASSERT_RTNL(); | |
35 | ||
6ca80638 | 36 | return dsa_stubs->conduit_hwtstamp_validate(dev, config, extack); |
5a178186 VO |
37 | } |
38 | ||
39 | #else | |
40 | ||
6ca80638 FF |
41 | static inline int dsa_conduit_hwtstamp_validate(struct net_device *dev, |
42 | const struct kernel_hwtstamp_config *config, | |
43 | struct netlink_ext_ack *extack) | |
5a178186 VO |
44 | { |
45 | return 0; | |
46 | } | |
47 | ||
48 | #endif |